When should I use aren't and wasn't?
"How and when can I use 'no' and 'not'?"

Please tell me if those questions are the same.
A: no

What's the temperament of a border collie/beagle mix?
What is the temperament of a Border Collie-Rottweiler mix?

Please tell me if those questions are the same.
A: no

What makes New York City the greatest city in the world?
Why is New York one of the greatest cities in the world?

Please tell me if those questions are the same.
A:
yes